Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Retrospective motion compensation using variable-density spiral trajectories.

General Leung1, Donald B Plewes

  • 1Department of Medical Biophysics, University of Toronto, Sunnybrook and Women's College Health Sciences Center, Toronto, Canada.

Journal of Magnetic Resonance Imaging : JMRI
|August 17, 2005
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Multispectral near-infrared spectroscopy study evaluating the effect of razor design on shaving-induced erythema.

Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI)·2024
Same author

Metformin for early comorbid glucose dysregulation and schizophrenia spectrum disorders: a pilot double-blind randomized clinical trial.

Translational psychiatry·2021
Same author

Breast Cancer Mortality among Women with a <i>BRCA1</i> or <i>BRCA2</i> Mutation in a Magnetic Resonance Imaging Plus Mammography Screening Program.

Cancers·2020
Same author

Rapid tissue viability evaluation using methemoglobin as a biomarker in burns.

International journal of burns and trauma·2018
Same author

Cost-effectiveness of telemonitoring screening for diabetic foot ulcer: a mathematical model.

CMAJ open·2018
Same author

Views of Patients on Using mHealth to Monitor and Prevent Diabetic Foot Ulcers: Qualitative Study.

JMIR diabetes·2018
Same journal

A Quantitative Modification of VI-RADS for Bladder Cancer at the Ureteral Orifice: A Reader Study on MRI With Varying Experience Levels.

Journal of magnetic resonance imaging : JMRI·2026
Same journal

Editorial for "Integrating nnU-Net Segmentation and Clinical-Radiomics for Multicenter Prediction of Soft Tissue Sarcoma Grade and Ki-67 Expression".

Journal of magnetic resonance imaging : JMRI·2026
Same journal

Structural MRI Volumetry Index for Differentiation of Progressive Supranuclear Palsy From Parkinson's Disease and Multiple System Atrophy by Automatic Segmentation: A Comparison With Magnetic Resonance Parkinsonism Index.

Journal of magnetic resonance imaging : JMRI·2026
Same journal

Integrating nnU-Net Segmentation and Clinical-Radiomics for Multicenter MRI-Based Assessment of Soft Tissue Sarcoma Grade and Ki-67 Expression.

Journal of magnetic resonance imaging : JMRI·2026
Same journal

Optimization of Respiratory Training Methods for Cardiac Magnetic Resonance Imaging.

Journal of magnetic resonance imaging : JMRI·2026
Same journal

Editorial for "Voxel-Wise Radiomics Habitat Analysis of Post-Treatment Gliomas for Noninvasive Differentiation of True Progression and Pseudoprogression".

Journal of magnetic resonance imaging : JMRI·2026
See all related articles

This study introduces a new method using variable-density spiral (VDS) trajectories to correct motion artifacts in medical imaging. The technique effectively reduces motion corruption in MRI scans, improving image quality.

Area of Science:

  • Medical Imaging
  • Magnetic Resonance Imaging (MRI)
  • Image Reconstruction

Background:

  • Motion artifacts are a significant challenge in MRI, degrading image quality and potentially leading to misdiagnosis.
  • Existing motion-resistant acquisition trajectories still suffer from residual motion artifacts.
  • Retrospective correction methods are crucial for enhancing diagnostic accuracy in MRI.

Purpose of the Study:

  • To develop and validate a retrospective motion correction method using variable-density spiral (VDS) trajectories.
  • To assess the efficacy of VDS trajectories in reducing motion artifacts in MRI.
  • To optimize VDS trajectory design parameters for effective motion compensation.

Main Methods:

  • Designed VDS trajectories with adequate sampling of the central k-space region.

Related Experiment Videos

  • Utilized the central overlapping k-space data to measure interleaf rigid body motion.
  • Applied phase shifts and rotations to k-space data for artifact removal.

    • Main Results:

    • Demonstrated significant reduction of motion artifacts in both phantom and volunteer studies.
    • Showcased the technique's ability to further improve images from motion-resistant acquisitions.
    • Identified registration accuracy dependence on VDS trajectory design parameters.

    Conclusions:

    • Appropriately designed VDS trajectories enable significant retrospective reduction of residual motion artifacts.
    • Near-optimal parameters for VDS retrospective correction include ~8% central k-space overlap and ~70 interleaves.
    • This method enhances MRI image quality by correcting for in-plane rigid body motion.